경제적 손실을 고려한 기대손실 능력지수의 개발

Abstract

Process Capability Index (PCI) is useful Statistical Process Control (SPC) tool that is measure of process diagnostic and assessmenttools widely use in industrial field. It has advantage of easy to calculate and easy to use in the field. Cp and Cpk are traditionalPCIs. These are only considers of process variation. These are not given information about the characteristic value does notmatch the target value of the process. Studies of this process capability index by many scholars actively for supplement of itsdisadvantage. These studies to evaluate the capability of situation of various field has presented a new process capability index. Cpm is considers both the process variation and the process deviation from target value. And Cpm+ is considers economic lossfor the process deviation from target value. In this paper development of new process capability index that is Taguchi's quadraticloss function by applying the expected loss. And check the correlation between existing traditional process capability index (Cpk)and new one. Finally, we propose the criteria for classification about developed process capability index.